I set up a 220 gallon aquarium about 15 years ago. I can't fit a single large sump in my stand, so I currently have two plastic tote bins (joined by bulkheads) linked together to house my drain lines, skimmer, heaters and return pumps. I am now worried about the plastic totes getting old and want to redo my sumps and plumbing. I will still need to use multiple sumps linked together, just using bulkheads as I currently do. Either I would need someone to custom make my sumps to fit or I will need to make them myself. I am not comfortable making acrylic sumps myself, so I am looking at using molded polyethylene tanks. They are expensive, but not quite as much as acrylic, and they appear to be a bit easier to drill. Should be stronger and more stable than the totes I am using currently. Also, being molded, they don't have any seams that may leak with time if I don't weld the acrylic properly. Anyone ever use polyethylene tanks as sumps themselves or have any experience with them?